mensor CPC8000, Руководство по эксплуатации

Страница: 75 / 113

High-End Pressure Controller
CPC8000
Operating Instructions - CPC8000 75
5. To calibrate the”High Point”:
• The “High Point” Calibration is done in a similar way as the “Low Point” but should be performed in
[Measure] mode.
• Place the instrument in Measure mode by pressing the [Measure] button within the 2 point Calibra-
tion Screen.
• Supply a pressure to the Measure/Control Port using a pressure standard. This pressure should
be as close as possible to the full scale value of the selected transducer or at least within 20% of
that value. The [Too Low] button will change to a [Reading] button when the pressure reaches an
acceptable range.
• After the pressure stabilizes, select the [Reading] button to accept the instrument’s reading of the
pressure input. The actual reading will appear within a green background where the [Reading]
button was.
• Press the [New Value] button and enter the “true pressure”. This value is obtained from the
pressure measured by the calibration standard. After the value has been accepted by pressing the
check [ ] mark on the numeric key pad, the value will appear with a green background where
the [New Value] button was. These actions completes the High Point calibration.
• The [Save] button will now be active, press it to store the values in the transducer.
7.5.2.5.3 Linearize
The [Linearize] application (see fgure 7.5.2.5.3a) provides a place to record [As Found] calibration data
and to linearize each internal transducer in the CPC8000 using that data. An “as found calibration” can
be performed by connecting a suitable pressure standard to the Measure/Control port, placing the instru-
ment in [Measure] mode and supplying all 11 pressure points across the complete range of the trans-
ducer being calibrated. The record of the pressures generated or measured by the pressure standard
and the corresponding reading from the instrument’s transducer can be recorded and transcribed into the
[Linearize] / [As Found] screen. The screen is accessed by pressing the [As Found] button in the {Linear-
ize] screen.
Figure 7.5.2.5.3a - Linearize / As Found
In the [Linearize] / [As Found] screen choose the transducer to be linearized by pressing the [Primary],
[Secondary], [Tertiary], or [Barometer] button. Pressure test points generated by the reference standard
are entered in the column labeled “Reference”; each of the corresponding readings from the instrument’s
transducer should be entered into the column labeled “Actual”. To enter readings, simply press the corre-